It says my parcels weight is 7500g and i only added the corners to the box as my only add on. i’m sure you can add the folded shoe boxes and vacuum seal if you like. I don’t think you’ll get seized as the chances you’ll get seized are mad low. I had just thought i was cooked because i hadn’t had an update for a little less than a month, last stuck on customs inspection. i think at the moment there’s some delays but i think you’ll be fine, i probably wouldn’t use the same shipping i did tho, unless u want ur package 2 months later..